Sole-machine.



E. E. WINKLEY.

SOLE MACHINE.

APPLIGATION FILED FEB. 2, 1911.

Patented Feb. 23, 1915.

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E. E. WINKLEY.

SOLE MAGHINB.

APPLICATION FILED FEB. 2, 1911.

Patented Feb. 23, 1915.

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THE NORRIS PETERS CO. FHOTC-LITHO WASHINGTON. D W M w M E., B. WINKLEY.

SOLE MACHINE.

APPLICATION FILED FEB; 2, 1911.

Patented Feb. 23, 1915.

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THE NORRIS PETERS 60.. PHOTG'LITHQ. WASHINGTON n. c.

UN 11 ii ERASTUS E. WINKLEY, OF LYNN, MASSACHUSETTS.

SOLE-MACHINE.

risasvo.

Application filed February 2, 1911.

To all whom it may concern:

Be it known that I, ERASTUS E. WINKLEY, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new In the manufacture of Goodyear shoes, it

is customary to skive the shank portion of the outsole upon the flesh side. This is done in order that the upper surface of the Welt at the point where the welt terminates at the heel seat shall lie in a continuous unbroken line with the sole after the outsole has been applied to the shoe. A further feature of advantage resulting from this operation is that a light edged shank is produced upon the sole which imparts a better finish to the shoe as a whole and enables the shank to be more readily shaped by the leveling machine.

The object of the present invention is to provide an improved mechanism which will successfully round and skive out soles of all shapes and sizes without necessitating any change or alteration in the working position of the sole. With this object in view, a feature of the invention contemplates the provision of a pair-of skiving knives movable lengthwise of the sole, and means for automatically imparting transverse move ments to the knives at certain points in their lengthwise movement in order to bring them into and out of working relation with the sole. Broadly considered, this feature of the invention is not limited to the use of a pair of knives, but contemplates the use of one or more knives if so desired. The knives are automatically retained out of engagement with the sole when opposite the ball portion and heel seat of the sole, but are brought into engagement with the sole when moving along the shank portion. Preferably the Specification of Letters Patent.

Patented Feb. 23, 1915.

Serial No. 606,104.

sole is clamped upon a pattern to prevent its buckling and the knives are guided by this pattern when moving along the shank in skiving out this portion of the sole.

While in the best form of the invention at present known to the inventor the skiving operation is performed while the sole is clamped to the pattern of a sole rounding machine, obviously this is not essential and certain features of the invention relating to the shank skiving mechanism are not limited to use in combination with sole rounding mechanism.

Still further features of the invention will be fully described in the accompanying specification and defined in the appended claims.

In the drawings which illustrate the preferred form of the invention, Figure 1 is a side elevation of the machine; Fig. 2 is a plan showing the skiving knives in their inoperative position; Fig. 8 is a view similar to Fig. 2 illustrating the skiving knives in their forward position preparatory to performing the skiving operation; Fig. 1 is a transverse section in elevation on the line 4%, of Fig. 2, looking in the direction of the arrows; Fig. 5 is a transverse section in elevation on the line 5-5, of Fig. 2, looking in the direction of the arrows; Fig. 6 is a detail illustrating the knives and showing one of the knives in operative engagement with the sole; Fig. 7 is an end elevation of the parts shown in Fig. 6; and Fig. 8 is a side elevation of the parts shown in Fig. 6.

In the illustrated embodiment of the invention the machine is supported upon a column 1 which is provided with an overhanging arm 2 extending upwardly from the column and from one side thereof. A pattern 3 is supported rigidly upon the column 1 by means of a standard 5 bolted to the upper portion of the column and a rotary table or support 7 is journaled upon the standard and is rotated about the pattern, in the operation of the machine, by the bevel gears 9 and 10. The sole is clamped upon the pattern 3 by a hand operated clamping block 11 which is supported by the overhanging arm 2. A roundin knife 13 is mounted upon the rotary table F and is yieldably held in engagement with the pattern 3 in order to trim the sole to the shape of the pattern. The knife is made to follow approximately the contour of the pattern by a cam 14% to which the knife is connected by suitable operative connections.

An auxiliary cam 15 is also provided for further controlling the movements of the knife and means, indicated at 16, is provided for adjusting the position of this cam in order to accommodate for varying sizes and shapes of patterns. This particular construction forms no part of the present invention and for further illustration and description reference may be had to the patent to Mayo, No. 882,009, dated March 17 1908.

In accordance with the present invention the soles are not only rounded by the mechanism just described but the shank skiving operation is also performed while the sole remains clamped upon the pattern 3. The skiving mechanism is preferably arrangedto remain normally in an inoperative position during the operation of the rounding knife and the movement into and out of operative position in the present embodiment of the invention, is under the control of the operator. The soles are positioned for the rounding operation so that the ball line, whatever the size of the sole, is always at substantially the same point relative to the machine parts. The shank skiving should extend from the ball line to the breast line of the heel, but not beyond the breast line and onto the heel seat for reasons well known to those skilled in the art. In order that the knives may commence their working stroke at the ball line, the mechanism which controls their movement, in the preferred construction, is arranged to retain them out of engagement with the sole during their forward movement toward the toe portion of the sole, and arranged to move the knives into engagement with the sole at the ball line upon the return movement and maintain such engagement until the breast line is reached. The invention as defined by the claims, however, is not limited to this particular mode of operation but is of suflicient scope to include a movement of the knives into operative engagement with the sole during their movement in either di rection.

The skiving knives 20 and 21 are supported upon a frame or carriage 22- slidinglv mounted upon parallel guide rods 23 and 241, which extend longitudinally of the sole. The knife frame 22 comprises a pair of sleeves 23 and 25 which are slidingly mounted on the guide rods 23 and 24, respectively, they being connected together by the transverse webs of the frame. The guide rods are supported by an upwardly projecting bracket 25 secured to the column 1 and provided with a base plate or table 18 at its upper end. The rod 23 is fastened at one end in an arm 26 mounted upon the bracket 25 and is held at its opposite end in an arm 27 mounted on the arm 2. The rod 2 1 is held at its opposite ends in arms 20 and 30 which project upwardly from the bracket 25. The frame is provided with a conveniently located handle 32 by means of which it may be moved toward and from the sole. The knives 20 and 21 are mounted upon the forward ends of a pair of supporting arms 33 and 81, respectively, which are pivoted between their ends in the frame These knife arms are provided at their rear ends with cam rolls 38 and 39. The knives are moved lengthwise of the sole by sliding the frame 22 on its guide rods and are moved transversely of the sole to place them in and out of operative engagement with the work by oscillating the arms 33 and 31 about their pivots.

The sole, which is to be operated on, is indicated at 40 (Figs. 2 and 3) and when clamped in position for the rounding operation it also is held in proper position to be operated upon by the skiving knives. It is not necessary, therefore, to adjust or vary the position of the work during the entire operation of rounding the sole and skiving out the shank. Means is provided upon rounding machines of the type illustrated to automatically stop the operation of the rounding knife when that operation has been completed. Such mechanism, in a simple rounding machine stops the knife in the shank near the breast line, where the edge of the sole is straightest. In the present invention, however, the trip stop 35 (Fig. 1) is so arranged that the clutch controlling the movement of the rotary table 7 is thrown into and out of operation when the rounding knife 18 is at a position remote from the shank, as illustrated (see Figs. 2 and 3) at the end of the forepart of the sole. Vhen in this position the knife does not interfere with transverse movement of the skiving knives to bring them into and out of operative engagement with the sole.

The transverse movements of the knives are automatically controlled and such controlling mechanism preferably comprises a plurality of cams which act on the knife carrying arms 33 and 34% to retain the knives out of operative engagement with the sole when they are opposite the ball portion and heel seat of the sole, suitable means, hereinafter referred to, being provided to move the knives in. These cams are inoperative when the knives are in cutting relation to the sole and their path of movement is then controlled by the contour of the sole, or of the pattern 3. To this end cams a1 and 1-2 (Fig. 3) are supported upon the table 18 and are arranged to be engaged by the rolls 38 and 39, their configuration being such that the knives 20 and 21 are retained outof engage ment with the sole when the knives are opposite its heel portion. The rolls 38 and 39 are held against the cams 41 and 42 by springs 47 and 48 presently to be described,

which normally tend to move the knives into operative engagement with the work. The pivots of the arms 33 and 34 comprise rotatable stud shafts 43 and 44, which are journaled in a hollow head 45 (Fig. 4), forming the central portion of the frame 22. The arms 33 and 34 pass through the hollow head and are fastened to the stud shafts 43 and 44 in any suitable manner. A pair of coiled springs 47 and 48 (Fig. 4) surround the stud shafts and are connected at their lower ends to the head 45 and at their upper ends to a pair of collars 49 and 50. These springs are arranged to rotate the shafts 43 and 44 in a direction to move the knives 20 and 21 inwardly to engage with the sole.

It is not desired that the knives shall engage with the shank when the frame 22 is moved forward and to this end a pair of curved cam fingers 52 and 53 (Fig. 3) are fastened to the upper ends of rotatable pins 54 and 55, journaled in the table 18. The rotation of these pins is controlled by a pair of springs 56 and 57 which retain the rear ends of the fingers in contact with the faces of the cams 41 and 4-2 (see Fig. In order that the cam rolls 38 and 39 shall ride smoothly onto the fingers from the faces of the cams 41 and 42 and in order to avoid displacement of the fingers in a vertical direction, the ends of the fingers are tapered where they bear upon the cams and are rabbeted at their upper sides so as to engage with a reverse rabbeting in the faces of the cams, as shown clearly in Figs. 3 and 5. As the frame 22 carrying the knives is moved forward, the cam rolls 38 and 39 engage respectively with the cam fingers 52 and 53 and are guided in their further forward movement by these fingers. In order to retain the knives out of engagement with the sole when opposite the ball portion thereof, a pair of cams 58 and 59 are mounted on the table 18. During the continued forward movement of the frame 22, the rolls 38 and 39 advance beyond the pivotal points of the fingers 52 and 53 and the springs 47 and 48 act to spread the fingers apart until their forward ends engage the faces of the cams 58 and 59, respectively. The fingers are held in this position until the rolls ride onto the cams 58 and 59 when the fingers are released and they immediately resume their initial position. As the frame 22 is returned, however, the rolls ride between the cam fingers and the cams 58 and 59 and follow the contour of the cams by reason of the action of the springs 47 and 48. The cams 58 and 59 may be of any preferred form but are preferably arranged with a pair of parallel faces, which serve to retain the knives out of engagement with the sole when opposite the ball portion, such faces terminating abruptly and continuing as rapidly diverging curved faces which allow the knives to be moved into engagement with opposite margins of the sole by the coiled springs 47 and 48.

in order to avoid the substitution of new cams for each pattern having a different shaped shank, it is preferred to render the cams 58 and 59 inoperative during the actual cutting movement of the knives and to this end a pair of stops or gages 60 and 61 (l igs. 1, 7 and 8) are mounted upon the outer ends of the knife carrying arms in a position below the knives. These gages are arranged to contact with the edge of the pattern and cause the knives to follow the contour of the pattern during their working movement. At this time the rolls 38 and 39 are not in operative engagement with any of the cams. As has been stated it is desired to move the knives out of operative engagement with the sole in time to terminate the skiving at the breast line of the heel and for this purpose the cams 41 and 42 are provided with oblique working faces 62 and 63 (Fig. 3) which are arranged to be engaged by the cam rolls at the proper time and move the knives away from the sole into an inoperative position. During the latter portion of the rearward movement of the knives the rolls contact with the outer sides of the cam fingers 52 and 53, force them inward and travel between them and the cams 41 and 42 until the position of Fig. 2 is reached when the fingers spring back to their normal position against the cams.

in the majority of shoes, the shank is longer at the inside of the shoe than upon the outside of the shoe. This is for the rea son that the ball line which extends obliquely across the sole forms the line of demarcation between the ball portion and the shank portion of the sole. Upon different styles of shoes the ratio between the lengths of the inside and outside edges of the shank varies and the inclination of the ball line is also varied accordingly. When operating upon the sole of a right shoe, such as shown in Figs. 2 and 3, for example, the knife 20 is arranged to operatively engage with the sole in advance of the knife 21. The amount of this advance engagement, however, will vary according to the style of the shoe and. it is accordingly desirable to provide means for accomplishing this end. As the soles are always placed upon the pattern with the same face up, when operating upon the sole of a left shoe, it is necessary to operate the knife 21 in advance of the knife 20. It is also necessary, in order to accurately skive out both soles of the same pair, that means he provided for imparting to each knife an equal amount of advance operation. To this end the cams 58 and 59 are mounted so that their relative longitudinal position can be adjusted. They are, therefore, detachably fastened to a pair of sliding plates 6st and (Fig. 4), which are supported on the table 18 and are retained in position at their outer derside' of the table 18 and connected at and 73 to the cam supporting plates 58 and 59, respectively. The table 18 is slotted at 7 5 and 76 (see dotted lines Fig. 3), in order to allow the operating arm to be connected to the cam supporting plates. It will be noted that the arm is connected to the two plates at equal distances from its fulcrum and thus upon oscillating the arm, the plates will be moved equal amounts in opposite directions. In order to retain the plates in any desired position of adjustment, the table 18 is provided with a plurality of holes 77 (see dotted lines Fig. 3) which are spaced at appropriate intervals and a spring pressed latch 78, mounted upon the arm, is arranged to engage with any one of the holes. A handle 7 9 is formed upon the end of the arm 70 conveniently accessible to the operator and a latch lever 80 is connected to the latch 78 in order to release the latch when it is desired to adjust the cam plates. It will be obvious to those skilled in the art that the several holes may be spaced in such a manner that by engaging with a hole in the center of the row the knives will be made to operatively engage the sole at the same period of time and that by engaging with different holes upon either side of this central hole either knife may be operated in advance of the other as desired.

Owing to the fact that the breast line is normal to the longitudinal line of the sole,

both knives should be removed from operative engagement with the work at the same time and for this reason it is essential that the cams 4:1 and 42, which control the removal of the knives from operative position, should have equal longitudinal adjustments. As the length of the shank changes upon varying sizes of shoes, and, as the ball line is retained in substantially the same position longitudinally of the sole, it is essential that this difference in the length of the shank be taken care of by changing the point at which the skiving knives are removed from engagement with the sole. To this end the cams 41 and 12 comprise a pair of fiat plates which are detachably fastened to a supporting plate 81 (Fig. 5) slidingly supported upon the table 18 and retained in position by the gibs 67 and 68. To provide for moving this plate longitudinally, it is provided with an oblique slot 82 (Fig. 3) which is engaged by a roll 83 j ournaled upon a vertical stud 84 mounted in a movable block 85. The block 85 is threaded on a transversely arranged screw 86 (Fig. 5) journaled at its opposite ends in downwardly projecting lugs 87 and 88 on the table 18 which is rotated by a hand wheel 89. On rotating the screw 86 the block 85 is moved transversely and by reason of the engagement of the cam roll 83 with the oblique slot 82, the plate 81 is moved longitudinally.

As soles of varying thickness and having 0 different width shanks are to be operated upon, it is necessary to provide means for giving various adjustments to the skiving knives. When skiving the soles in this particular manner the desideratum is to obtain a predetermined thickness of sole edge. The angle of the bevel or skived out portion of the sole face and the distance be tween the inner edges of these bevels are not so important. the knife holder supporting blocks 90 and 91, at the forward ends of the arms 33 and 3% respectively, are connected by a dovetailed slideway to the arms and are adjustable by means of screws 92 and 93 (Fig. 8). The adjusting screws are threaded into the arms and have collared heads engaging with laterally projecting flanges 91 and 95 on the upper portions of the blocks 90 and 91. The blocks 90 and 91 are provided upon their vertical front faces with curved guide ribs 96 which are engaged by correspondingly curved slots formed upon the inner faces of knife holders 97 and 98. The knife holders are retained in adjusted posi tion by set screws 99 and 100 threaded into the blocks 90 and 91 passing through slots formed in the knife holders to permit angular adjustment of the knives (see Fig. 7). The skiving knives 20 and 21 are retained in their holders by any convenient form of clamping means indicated at 101 and 102 which permits adjustment toward and from one another. By means of this construction the knives may be adjusted bodily in a vertical direction and may also be adjusted angularly and transversely and the combination of these adjustments enables any desired position of the knives to be obtained. In order to positively guide the knives and determine the thickness of the edge of the sole at the shank, curved arms or guides 103 are fastened upon the undersides of the arms 83 and 8st and project downwardly and laterally into a position to contact with and bear upon the under surface of the pattern 8. The stop members 60 and 61 may conveniently be mounted upon these arms (see Fig. 7). The edge of the sole is held down in advance of the knife by presser feet To obtain this result 90 105 supported upon the lower ends of spring pressed plunger-s 106 which are slidingly mounted in bosses 107 and 108 (Fig. 6) formed upon the blocks 90 and 91. The

spring pressure is maintained by coiled springs 109. The downward movement of the presser feet is limited by a plurality of stop nuts 110 which are threaded upon the upper ends of the plungers. The beveled edges of the knives tend to draw them downwardly and constantly make a deeper out if no provision is made to prevent it and the presser feet serve to prevent the knives from cutting too deeply into the sole.

"While it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed and modified without departing from the broader features of the invention. a

What is claimed as new, is

1. A machine for operating on soles, having, in combination, means for clamping the sole in position, a pattern, a trimming knife, means for relatively actuating the knife and pattern in order to trim the edge of a sole to approximately the finished shape, and mechanism operating independently of the trimming knife actuating mechanism and arranged to skive out the shank of a sole while it is clamped in position, substantially as described.

2. A machine for operating on soles, hav-i ing, in combination, means for clamping the sole in position, a pattern, a trimming knife, means for relatively actuating the knife and pattern in order to trim the edge of a sole to approximately the finished shape, means for stopping the knife when in engagement with the end portion of the sole, and mechanism to skive out the shank portion of the sole when the trimming knife is inoperative and while the sole is clamped in position, substantially as described.

3. A machine for operating on soles, having, in combination, means for clamping the sole in position, a pattern, a trimming knife, means for relatively actuating the knife and pattern in order to trim the edge of a sole to approximately the finished shape, and mechanism to skive out the shank portion of the sole when the trimming knife is inoperative and while the sole is clamped in position, substantially as described.

4. A machine for operating on soles, having, in combination, a pattern, means for clamping a sole on the pattern, a knife carrier movable lengthwise of the sole, a skiving knife supported on the carrier, means acting to retain the knife out of engagement with the sole except when opposite the shank portion thereof, and a guide adapted to operatively engage with the pattern and control the movement of the skiving knife when the knife is in contact with the shank portion of the sole, substantially as described.

5. A machine for operating on soles, having, in combination, a skiving knife adapted to be reciprooated longitudinally of the sole, means for retaining the skiving knife out of contact with the sole when moving in one direction, and means for guiding the knife whenmoving in the opposite direction arranged to allow the knife to operate on the sole at the shank portion, substantially as described.

6. A machine for operating on soles, having, in combination, a skiving knife adapted to be reciprocated longitudinally of the sole, means for retaining the skiving knife out of contact with the sole when moving forward toward the toe portion, means for guiding the knife when moving in the opposite direction arranged to allow the knife to operate on the sole at the shank portion, and a guide adapted to control the movement of the knife along the shank portion of the sole whereby the knife is caused to follow the contour of thesole during its operation, substantially as described.

7. A machine for operating on soles, having, in combination, a. pattern for supporting a sole, a skiving knife actuated relatively to the sole, means normally tending to move the knife into engagement with the sole, and a cam plate for retaining the knife out of engagement with the sole when the knife is opposite the ball portion thereof, the cam plate being arranged to allow the knife to engage with the sole when opposite the ball line thereof, substantially as described.

8. A machine for operating on soles, having, in combination, a pair of skiving knives adapted to move lengthwise of the sole, and means to allow an inward transverse 1novement of the knives when opposite the ball line of the sole, said means adapted to be adjusted longitudinally in order to enable the skiving knives to be moved into engagement with the sole at different points along the edge of the sole, substantially as described.

9. A machine for operating on soles, having, in combination, a frame movable longitudinally of the sole, a pair of skiving knives pivotally mounted upon the frame and adapted to contact with the surface of the sole upon a portion of the opposite margins thereof, and means for automatically oscillating the skiving knives transversely of the sole to move the knives into and out of engagement therewith as the frame is moved longitudinally, substantially as described.

10. A machine for operating on soles, having, in combination, a sole support, a skiving knife for skiving out the shank of the sole, a fixed guide engaging with the under side of the sole support opposite the knife, means for adjusting the knife vertically, and

f to

means for adjusting the knife in a curved path to vary the angle of the bevel made by the knife while maintaining a constant thickness of the sole edge.

11. A machine for operating on soles, having, in combination, a pattern, means for clamping the sole upon the pattern, a skiv- "ing knife arranged to skive out one surface of the sole, and a guide contacting with the under surface of vthe pattern cooperating with the knife to maintain a constant thickness of the sole edge, substantially as described.

12. A machine for operating on soles, having, in combination, a pattern, means for clamping the sole upon the pattern, a skiving knife arranged to skive out one surface of the sole, means contacting with the under surface of the pattern and adapted to positively limit the upward movement of the knife, and a yielding presser foot supported in advance of the knife adapted to bear upon the surface of the sole to hold the same in positionfor the operation of the knife, substantially as described.

13. A machine for operating on soles, having, in combination, a knife to skive out the shank of the sole, means to move the knife longitudinally of the sole, means normally tending to move the knife into engagement with the sole, a cam arranged to move the knife out of engagement with the sole at approximately the breast line, and means to adjust the cam longitudinally of the sole in order to accommodate varying lengths of shanks, substantially as described.

14. A machine for operating on soles, having, in combination, a pair of skiving knives arranged to move longitudinally of the sole, means normally tending to move the knives into engagement with the sole, and a plurality of cam plates arranged to hold the knives out of engagement with the sole when opposite the ball portion and heel seat and to allow the knives to engage with the sole along the shank portion, substantially as described.

15. A machine for operating on soles, having, in combination, a pair of skiving knives arranged to move longitudinally of the sole, means normally tending to move the knives into engagement with the sole, a plurality of cam plates arranged to hold the knives out of engagement with the sole when opposite the ball portion and heel seat and to allow the knives to engage with the sole along the shank portion, and means for imparting a longitudinal movement of the cams relatively to the sole, substantially as described.

16. A machine for operating on soles, having, in combination, a pair of skiving knives adapted to move longitudinally of "the sole, means normally tending to move the knives into engagement with the sole, a

pair of cams arranged to retain the knives out of engagement with the sole when opposite the ball portion and adapted to allow the knives to engage with the sole at the ball line, and means for imparting equal longitudinal movements in opposite directions to the cams, substantially as described.

17. A machine for operating on soles, having, in combination, a pair of skiving knives arranged to be reciprocated longitudinally of the sole, means normally tending to move the knives into engagement with the sole, a plurality of cam plates arranged to hold the knives out of engagement with the sole when opposite the heel seat and ball portion, and a pair of cam fingers adapted to retain the knives out of engagement with the sole when opposite the shank portion thereof, the cam fingers being operative only upon the movement of the knives in one direction, substantially as described.

18. A machine for operating on soles, comprising a pattern, means for clamping a sole to the pattern, a skiving knife movable lengthwise of the sole, means for retaining the knife out of engagement with the sole during a portion of the lengthwise movement, means for imparting a sole engaging movement in the plane of the sole to the knife, and a guide arranged to contact with the pattern and control the movements of the knife when in engagement with the sole, substantially as described.

19. A machine for operating on soles, having, in combination, a trimming knife, mechanism for actuating the knife to round the edge of the sole, means for stopping the knife when opposite the toe, and means operated independently of the knife actuating mechanism to bevel the margin of the sole when the knife is at rest, substantially as described.

20. A machine for operating upon soles, having, in combination, a pattern to which the sole is secured and a skiving knife capable of a relative actuation, a guide connected with the knife to cause the knife to follow the contour of the pattern when operating upon the sole, and a cam for moving the knife out of engagement with the sole having provision for adjustment to vary the point at which the knife is removed from the sole, substantially as described.

21. A machine for operating upon soles having, in combination, a pair of knife carrying arms, a knife supported upon the end of each arm, means for relatively actuating the knives and sole to cause the knives to traverse lengthwise of the sole, and means for automatically oscillating the knife carrying arms to cause the knives to enter and leave the sole, substantially as described.

22. A machine for operating upon soles, having, in combination, a pair of knives arranged to act upon the opposite marginal portions of the surface of a sole, means for margins of the sole to he of different lengths, relatively actuating the knives and sole in substantially as described.

a rectilinear direction longitudinally of the 7 sole, and independent means acting upon ERASTUS WINLLEY' each knife to impart sole engaging move- Witnesses:

ments to the knives at difierent times to GEORGE E. STEBBINS,

cause the skived out portions upon opposite N. D. MGPHAIL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washingten, D. 0. 

